P2P2004 is the fourth Conference in a continuation of annual
conferences concerned with the convergence of overlay network
technologies that empower the leaf-nodes. These technologies include
Peer-to-Peer, Grids, Clusters, and the Web Services that ride over
them. These overlay networks are converging toward a common set of
protocols due to their extensive implementations on the Internet and
other shared environments.

These new protocols render the overlay networks functionally
independent of the networks that they ride on. This has opened new
security issues. Not only must we be concerned with the security within
the overlay network, we must be concerned with the threats they may
spawn toward the networks they ride on.

Consistent with our previous conferences we promote a
collaboration in research between academic institutions, government
organizations, and business enterprises that are concerned with the
research and implementation of P2P, Grids, and Clusters.

Any topic that relates to Peer-to-Peer, Grids, and Clusters is
open for consideration. We would like to give special encouragement to
research papers on security technology and policy issues for these
overlay networks. Some of the suggested topics are:

Security in P2P Systems

Trust and Reputation

Accountability

Applications

Overlay System Monitoring

Agents

Overlay Super Computers

Middleware

Overlay Architectures

Network Management

Wireless

Protocols

Collaboration

Supernodes

Grids

Clusters

Object Location and Retrieval

Storage Systems

e-Commerce

We include all presented papers in the proceedings. The IEEE
Proceedings hardcopy will be available at the Conference.